The router must bind a PIM neighbor filter to interfaces that have PIM enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000019-RTR-000004	SRG-NET-000019-RTR-000004	SRG-NET-000019-RTR-000004_rule		Medium

Description
Protocol Independent Multicast (PIM) is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infrastructure. PIM traffic must be limited to only known PIM neighbors by configuring and binding a PIM neighbor filter to those interfaces that have PIM enabled.

STIG	Date
Router Security Requirements Guide	2013-07-30

Details

Check Text ( C-SRG-NET-000019-RTR-000004_chk )
Review the multicast topology diagram and determine if router interfaces are enabled for IPv4 or IPv6 multicast routing. If the router is enabled for multicast routing, verify all interfaces enabled for PIM have a neighbor filter bound to the interface. The neighbor filter must only accept PIM control plane traffic from the documented PIM neighbors. If PIM neighbor filters are not bound to all interfaces that have PIM enabled, this is a finding.

Check Text ( C-SRG-NET-000019-RTR-000004_chk )

Review the multicast topology diagram and determine if router interfaces are enabled for IPv4 or IPv6 multicast routing. If the router is enabled for multicast routing, verify all interfaces enabled for PIM have a neighbor filter bound to the interface. The neighbor filter must only accept PIM control plane traffic from the documented PIM neighbors. If PIM neighbor filters are not bound to all interfaces that have PIM enabled, this is a finding.

Fix Text (F-SRG-NET-000019-RTR-000004_fix)
Configure neighbor filters to only accept PIM control plane traffic from documented PIM neighbors. Bind neighbor filters to all PIM enabled interfaces.